Rb-Sr, U-Pb, K-Ar Geochronologic Study of the Condrey Mountain Schist, Klamath Mountains, Northern California and Southwestern Oregon

克拉马斯山脉是一个由奥陶系至晚侏罗系洋弧和岛弧亲和岩组成的弧形构造省，这些岩系在中生代板块汇聚期间增生到北美洲西缘。然而，实际的构造过程并没有很好地确定。最近的研究表明，在克拉马斯山脉中北部暴露的部分孔德雷山片岩可能是方济会杂岩的向东延伸。如果得到证实，这将表明克拉马斯岩石沿着浅层断层在方济各复合体上被冲了大约100公里。该项目将提供地质年代学、岩石学和同位素数据，以更牢固地建立Condrey山- Franciscan的相关性，并对所涉及的沉积过程进行更详细的描述。

The Klamath Mountains are an arcuate structural province of Ordovician to Late Jurassic oceanic - and island arc - affinity rocks that were accreted to the western margin of North America during Mesozoic plate convergence. However, the actual tectonic processes during accretion are not well established. Recent work has suggested that parts of the Condrey Mountain Schist exposed in the north-central Klamath Mountains may be an eastward continuation of the Franciscan Complex. If confirmed, this would indicate that the Klamath rocks have been thrust about 100 km over the Franciscan Complex along shallow faults. This project will provide geochronologic, petrologic and isotopic data to more firmly establish the Condrey Mountain - Franciscan correlation and to allow a more detailed account of the accretion processes involved.